Plastics — Determination of apparent density of material that can be poured from a specified funnel
Specifies a method for the determination of the apparent density of a moulding powder or a granular material. The sample is pured through a specified funnel into a measuring cylinder of 100 cubiccentimeter capacity, the excess is removed with a straightedge and the mass of the contents is determinded by weighing. Expression of the apparent density in grams per millilitre.
Starches, native or modified — Determination of total fat content
Hydrolysis of the product by boiling hydrochloric acid, and coagulation of the insoluble products by cooling. Separation by filtration, drying and isolation the wanted matter by solvent extraction. The method applies to contents less than 1,5 % (m/m).
This method gives three procedures for the analytical
determination of the amount of metallic copper present in textile
materials. The choice of method will depend on the content of
copper in the sample, the quantity of sample available, and the
other materials present in the sample.
Plastics — Melamine-formaldehyde mouldings — Determination of extractable formaldehyde
Liquids simulating fodd and beverages are placed in contact with mouldings of the sample material, under defined conditions. The formaldehyde content of the liquid is then determined and the quantity of formaldehyde extracted per unit area of content is calculated. Two spectrophotometric methods for the determination of formaldehyde in the liquid, using chromotropic acid disodium salt or…
Higher alcohols for industrial use — Methods of test — Part 5: Determination of total alcohols conte...
Relates to C6 to C13 alcohols. The principle based on esterification of alcohols present in a test portion by means of acetic anhydride, and titration of the excess acetic anhydride with a standard volumetric ethanolic potassium hydroxide solution, in the precence of phenolphtalein as indicator.
Maleic anhydride for industrial use — Methods of test — Part 4: Determination of maleic anhydride co...
The principle consists in the dissolution of a test portion in diluted standard volumetric sodium hydroxide solution and titration with standard volumetric sodium hydroxide solution in presence of phenolphthalein as indicator. - ISO 1390, Parts 1 to 6, replace ISO Recommendation R 1390-1970.
Maleic anhydride for industrial use — Methods of test — Part 6: Determination of iron content — 2,2&...
The principle is based on the dissolution, in hot hydrochloric acid, of the residue from the determination of the ash of a test portion (see ISO 1390/5). Reduction, by hydroxylammonium chloride, of the iron(III) contained in the solution thus obtained, formation of the coloured complex iron(II)-2,2'bipyridyl in a buffered medium. Photometric measurement of the coloured complex at a…
Aluminium and aluminium alloys — Determination of nickel — Spectrophotometric method using dimethylg...
The method is applicable to nickel contents between 0,001 and 3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.
